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1. $\overset{⇀}{r_{3}} = 2 \hat{i} + 4 \hat{j} - 5 \hat{k}$

A. $\frac{2}{7} \hat{i} + \frac{4}{7} \hat{j} + \frac{5}{7} \hat{k}$
B. $\frac{2}{7} \hat{i} + \frac{4}{7} \hat{j} + \frac{5}{7} \hat{k}$
C. $\frac{2}{7} \hat{i} + \frac{4}{7} \hat{j} + \frac{5}{7} \hat{k}$
D. $\frac{2}{7} \hat{i} + \frac{4}{7} \hat{j} + \frac{5}{7} \hat{k}$

Answer: Option C

Explanation:

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